L2 Network Engineer

L2 Network Engineer Interview Questions and Answers for Freshers

Updated 19 May 2024

Q1. what is use of routing and its uses?

Ans.

Routing is the process of selecting the best path for network traffic to reach its destination.

Routing helps in directing network traffic efficiently
It determines the best path for data packets to travel from source to destination
Routing protocols like OSPF, BGP, and EIGRP are used to exchange routing information
Routing tables are used to store information about network paths
Dynamic routing adjusts to network changes automatically

Q2. Define firewall generations and their roles

Ans.

Firewall generations refer to the evolution of firewall technology and their roles in network security.

First generation firewalls - packet filtering based on IP addresses and ports
Second generation firewalls - stateful inspection and improved security features
Third generation firewalls - application layer filtering and deep packet inspection
Fourth generation firewalls - next-generation firewalls with advanced threat protection capabilities
Each generation builds upon the previ...read more

Q3. What is IPS? How does it work?

Ans.

IPS stands for Intrusion Prevention System. It is a network security technology that monitors network traffic to detect and prevent malicious activities.

IPS is a network security technology that monitors network traffic in real-time.
It can detect and prevent malicious activities such as hacking attempts, malware infections, and denial-of-service attacks.
IPS works by analyzing network packets, comparing them to a database of known threats, and taking action to block or allow t...read more

Q4. Firewall works at what layer?

Ans.

Firewall works at the network layer.

Firewall operates at the network layer of the OSI model.
It filters and controls incoming and outgoing network traffic based on predetermined security rules.
Examples of firewalls include hardware firewalls, software firewalls, and cloud-based firewalls.

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Q5. What is IP Spoofing?

Ans.

IP Spoofing is a technique where an attacker impersonates another device by falsifying IP address in order to gain unauthorized access.

IP Spoofing involves manipulating the source IP address in a packet to deceive the recipient.
It is commonly used in DDoS attacks to hide the true source of the attack traffic.
Prevention methods include implementing ingress and egress filtering on network devices.
Examples of tools used for IP Spoofing include hping and Scapy.